If you're a developer, you'll find what you need on the Mozilla Developer Network (MDN). MDN offers documentation, demos, and a Q&A forum where you can ask questions and interact with other developers.

The following pages are a good place to start if you need help:

• Explore documentation on MDN. You'll find tutorials, tools and sample code for all skill levels.
• Post a question to the Mozilla Developer Network's Stack Overflow page.
• Get help with Developer Edition.

Here are just a few of the topics you'll find on MDN:

1. Open Web-facing technologies:
   • HTML
   • CSS
   • JavaScript
   • Web-facing APIs
   • Graphics
   • APIs / DOM
2. Firefox OS:
   • Open Web apps
   • Building and installing Firefox OS
   • Contributing to the Firefox OS project
   • Customizing Gaia
3. The Mozilla platform:
   • Gecko
   • Building and configuring Firefox
   • XUL
   • XPCOM
   • Firefox test channels (Nightly, Aurora and Beta)